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Nutrition, Vitamins & Supplements for Seniors
Heavy Multivitamin Use May Double Risk of Advanced
Prostate Cancer
Was not found to increase risk of developing
prostate cancer
 May 16, 2007 New research says men taking
multivitamins more than seven times a week may double their risk of
advanced and fatal prostate cancer over those not taking multivitamins.
But, it found no association between multivitamin use and the
development of localized prostate cancer.
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Nutrition, Vitamins & Supplements |
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The increased risk was strongest in men with a
family history of prostate cancer and men who also took selenium,
beta-carotene, or zinc supplements, according to the report published
yesterday in the Journal of the National Cancer Institute, which is not
associated with the U.S. governments National Cancer Institute.
The possibility that men taking high levels of
multivitamins along with other supplements have increased risk of
advanced and fatal prostate cancers is of concern and merits further
evaluation.
Millions of Americans take multivitamins because of
a belief in their potential health benefits, even though there is
limited scientific evidence that they prevent chronic disease.
Researchers have wondered what impact multivitamin use might have on
cancer risk.
Karla Lawson, Ph.D., of the National Cancer
Institute in Bethesda, Md., and colleagues followed 295,344 men enrolled
in the National Institutes of Health-AARP Diet and Health Study to
determine the association between multivitamin use and prostate cancer
risk.
After five years of follow-up, 10,241 men were
diagnosed with prostate cancer, including 8,765 with localized cancers
and 1,476 with advanced cancers.
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Government Panel Has Ideas on Supplements, Undecided
on Multivitamins
They do want more government oversight on
vitamins and dietary supplements
By Tucker Sutherland, editor
May 18, 2006 The vast majority of senior citizens
take multivitamins and other dietary supplements. Although usage
increases with age, it is a growing trend for all Americans, with more
than half spending $23 billion a year for the hope of better health.
Unfortunately, the National Institutes of Health's panel concluded their
extensive study yesterday with the conclusion "more rigorous
scientific research is needed before strong recommendations can be made
regarding MVM use to prevent chronic diseases." Their report is not
without some minimal guidance about supplements, including two
recommendations for seniors, and also adds new questions to the debate,
particularly about regulation.
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more...
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"Because multivitamin supplements consist of a
combination of several vitamins and men using high levels of
multivitamins were also more likely to take a variety of individual
supplements, we were unable to identify or quantify individual
components responsible for the associations that we observed," the
authors write.
In an accompanying editorial, Goran Bjelakovic,
M.D., of the University of Nis in Serbia, and Christian Gluud, M.D., of
Copenhagen University Hospital in Denmark, discuss the positive and
negative health effects of antioxidant supplements.
"Lawson [and colleagues] add to the growing
evidence that questions the beneficial value of antioxidant vitamin
pills in generally well-nourished populations and underscore the
possibility that antioxidant supplements could have unintended
consequences for our health," the authors write.
Victoria Stevens of the American Cancer Society
told USA Today that this report confirms her 2005 study on vitamins and
prostate cancer. A February study in The Journal of the American Medical
Association found vitamins A and E and beta carotene pills have no
health benefits and may increase the risk of death. "There certainly is
no evidence in healthy, relatively well-nourished people that vitamins
or antioxidants protect against chronic diseases," Stevens said.
Note: The Journal of the National Cancer
Institute is published by Oxford University Press and is not
affiliated with the U.S. National Cancer Institute.
Link to report, click here
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